<!DOCTYPE html>
<html lang="zh">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <form action="">
        用户名：<input type="text" required="required" placeholder="请输入" autofocus="autofocus" name="userName" autocomplete="off"> <input type="submit" value="提交"> 上传头像：
        <input type="file" multiple="multiple">
    </form>
</body>

</html>